... parallel surfaces in contact and then, in 1996 Etsion and Burstein [26] presented a mathematical model to describe the effect of hemispherical pores on the frictional performances of mechanical seals. They found that the most significant parameter was the ratio between the pore depth and the pore diameter...

...J. A. MacCalman; R. J. Williams; G. L. Ingram; S. I. Hogg The results from an investigation into the physics of how fluid curtains can be applied to improve the aerodynamic performance of conventional turbomachinery shaft and rotor seals are described in this paper. Computational fluid dynamics...

...Yibiao Chen; Lei Yang; Yao Yao; Decai Li; Yangyang Jiang; Lixiang Lv; Jie Yao; Jing Ma; Changgeng Wang; Hongsheng Zhang; Yuan Zhou A ferrofluid seal is a rotary seal widely used in the chemical industry, shipbuilding, aerospace, aviation, and other fields, demonstrating various advantages...

...Yvo Stiemcke; Stefan Thielen; Tim Schollmayer; Oliver Koch Radial shaft seals (RSS) are increasingly used in applications with highly dynamic rotational shaft movement, high accelerations, and frequent changes in the rotational direction, e.g. positioning robots. For such instationary conditions...

...Abdel-Salem Medjahed; Antoinette Blouin; Balint Pap; Noël Brunetière Inward pumping spiral groove seals are used in many applications, such as transmission gearboxes or electric vehicles, as they can provide zero leakage and very low operating friction. The spiral grooves are connected to the low...

...Anupam Bhandari The viscosity of ferrofluid has a vital role in liquid sealing of the hard disk drives, biomedical applications as drug delivery, hyperthermia, and magnetic resonance imaging. The theoretical expressions for ferrofluid viscosity and its limitation are presented in detail...

...Aashna Raj; Chiranjit Sarkar; Piyush Kumar; Manabendra Pathak This work presents an investigation of magnetohydrodynamic flow in a novel double restriction seal configuration using micro-Particle Image Velocimetry (µPIV). A conventional seal design has been modified to impart magnetic effects...

... for long annular seals L : = L ~ / R ~ = 6.0 . The test rig presented consists of a rotor driven by two motors to realize the spinning and whirling motion. The induced forces were measured with attached piezo-electric load cells. The corresponding moments were then calculated...

... Bearing Considering Turbulent, Thermohydrodynamic and Misaligned Effects ,” Tribol. Int. , 130 , pp. 245 – 260 . 10.1016/j.triboint.2018.09.007 [3] Black , H. F. , and Jenssen , D. N. , 1969 , “ Dynamic Hybrid Bearing Characteristics of Annular Controlled Leakage Seals ,” Proc. Inst...

... seals commonly serve as balance pistons in pumps while also restricting secondary flow. Prior experimental results obtained with a grooved seal operating with a mixture of air and mineral oil show the seal rotordynamic force coefficients vary significantly with the gas volume fraction (GVF). This paper...

... was adopted in order to measure the overall power loss of the axle box, as well as to isolate the power loss contribution of the major components: crown wheel, pinion, seals, and the tandem taper roller bearings supporting the pinion shaft and the crown assembly. Although it was not possible to directly...

...R. Goltsberg; M. Gilad This study describes an experimental investigation of the sealing performance of a metallic conical poppet and a polymeric annular seat with a round sealing edge. The experiments were carried out with nitrogen. The influence of the radius of the sealing edge and its surface...

...Xueliang Lu; Luis San Andrés; Jing Yang Seals in multiple-phase rotordynamic pumps must operate without compromising system efficiency and stability. Both field operation and laboratory experiments show that seals supplied with a gas in liquid mixture (bubbly flow) can produce rotordynamic...

..., a disc (Label 3) with 20-cm diameter is installed to represent the rotor part of the labyrinth seal. The rotor disc is made of alloy steel 42CrMo4(1.7225). The heat treatment for the rotor disc is quenching (840–860 °C) and tempering (about 580 °C). The hardness for the rotor disc is about 302–340 HB...

...Min Zhang; Dara W. Childs Hole-pattern (HP) seals are widely used in centrifugal compressors to control leakage. This paper investigates the behaviors of an HP with wet-gas mixtures. The mixture consists of oil and air with inlet liquid volume fraction (LVF) up to 8%. Injecting oil into the air...

...Lingsheng Han; Yongqing Wang; Kuo Liu; Ziyou Ban; Bo Qin; Haibo Liu; Minghua Dai Labyrinth seals are widely applied in turbomachinery for gas and liquid sealing. A series of labyrinth seal leakage equations so far have been proposed for compressible gas and few equations for incompressible liquid...

...Zhang Yan-chao; Zhou Rui-min; Yin Ming-hu; Zhang Yong-tao; Hu Hai-tao; Cui Ya-hui In order to find a good friction pair for the finger seal, the pin-on-disc friction tests matching the actual working conditions of finger seal are designed based on the performance simulation of finger seal...

...Markus Schulz; Marius Hagmayer; Matthias Baumann; Frank Bauer The function of a radial shaft seal is based on interactions between the sealing edge and the shaft counterface. To better understand these mechanisms, a look inside the sealing contact was taken. The procedure and the testing facility...

...Samia Dahite; Mihai Arghir The present work deals with the thermogasodynamic analysis of the segmented annular seal provided with Rayleigh pockets. The paper is a continuation of the work presented Arghir, M., and Mariot, A. (2017, “Theoretical Analysis of the Static Characteristics of the Carbon...

...Stefan Thielen; Balázs Magyar; Bernd Sauer Regarding the increasing demand in seal lifetime and energy efficiency, a detailed microscopic simulation is necessary—as an addition to experimental investigations—to better understand and improve radial shaft seals. For this purpose, typically...